JPH1159292A - Power supply device for electric appliance in vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a power to plural kinds of electric appliances which are properly put on or taken off against a vehicle, and simultaneously to perform safety actions corresponding to load characteristics of the electric appliances. SOLUTION: This device is so composed that a power is supplied to electric appliances from a battery 12 loaded in a vehicle, in the state that plural kinds of the electric appliances are selectively connected with a connector 38 on a vehicle side through connectors 4C which are put on or taken off. An information output means such as multiplex ECU 42 or the like is integrated, together with the electric appliances, into a unit 40A which can be put on or taken off, and a connection change-over means such as an intelligent power switch 60 or the like is installed between a power source and the connector 38 on the vehicle side. A loaded electric appliance is discriminated by an information signal outputted from the multiplex ECU 42 or the like, and the control to cut off the battery 12 from the connector on the vehicle side is performed, in case that a detected current value is higher than the upper limit of the current corresponding to the electric appliance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying electric power from a power supply to an electric component in a vehicle such as an automobile.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a circuit for supplying power to electrical components in a conventional vehicle. In the figure,
A fusible link FL is connected to the battery BT, and a circuit is branched for each electrical component 90 on the downstream side, and a fuse F is individually provided upstream of each electrical component 90.
S is provided. These fuses FS are used to quickly shut off the circuit when an overcurrent occurs due to a short circuit or the like, and have a capacity suitable for the load characteristics of each electrical component 90. . Specifically, as the electrical component 90 has a larger current capacity, a fuse FS having a larger capacity, that is, a fuse having a larger minimum current value (allowable current value) for blowing the fuse is used.

[0003]

In recent years, electrical components used in vehicles such as automobiles have been diversified and diversified. However, the space in which the electrical components can be installed is limited, and the user truly needs it. It is desired to be able to use electrical components efficiently. As such means, for example, it is conceivable that a plurality of types of electrical components can be attached to and detached from a connector installed in the vehicle body, and the electrical components used at that location can be appropriately replaced.

However, in the conventional power supply circuit as shown in FIG. 9, if the connector is provided as it is downstream of the fuse FS in FIG. 9, depending on the electrical components connected to this connector, The current capacity of the electrical component does not match the capacity of the fuse FS, and the fuse FS does not blow even though a current exceeding the allowable current value of the electrical component is generated. Fuse FS despite not exceeding allowable current value
May be melted.

That is, in the conventional power supply circuit, since the capacity of the fuse FS is determined, if a plurality of types of electrical components having mutually different load characteristics are exchangeably connected to the downstream side, the current capacity is matched. There is a disadvantage that the safe operation cannot be performed.

The present invention has been made in view of such circumstances, and allows a plurality of types of electrical components to be selectively attached to and detached from a specific portion of a vehicle.
Further, it is an object of the present invention to provide a device capable of automatically performing a safe operation adapted to the load characteristics of the electrical component while improving the functionality by enabling good power to be supplied in the mounted state. .

[0007]

As a means for solving the above-mentioned problems, the present invention relates to the above-mentioned apparatus, wherein when the detachable connector of any detachable unit is connected to the vehicle-side connector, the information output means thereof is provided. Outputs an information signal for electrical component determination, whereby the power supply control unit can determine which detachable unit is attached. Thereafter, a current flowing from the power supply to the vehicle-side connector at the time of power supply is detected, and when this detected value exceeds a current upper limit value corresponding to the electrical component, the connection switching means is switched to a cutoff state, and the electrical The power supply to the product is stopped. Therefore, even when a plurality of types of electrical components are selectively connected to the vehicle-side connector, the connected electrical components are automatically determined, and power supply control appropriate for the load characteristics is executed.

The information output means may output an information signal for the purpose of merely discriminating electrical components. However, the information output means stores data relating to the current upper limit value and includes the data. If an information signal is output, the amount of information to be stored can be distributed to each detachable unit, and the storage capacity required by the power supply control means can be greatly reduced.

In a state in which the detachable connector of any detachable unit is not coupled to the vehicle connector, the vehicle connector may be connected to a power source or may be disconnected. However, if the disconnection state is set as in the latter case, the circuit is short-circuited even if conductive foreign substances (eg, water or metal) simultaneously contact a plurality of terminals of the vehicle-side connector to which the detachable-side connector is not connected. There is no fear.

The information output means and the power supply control means may be connected by the same number of wires as the number of types of signals. However, if multiplex communication is performed between the two means, the number of signal lines is reduced. Can be greatly reduced, and the wiring structure can be simplified.

In this case, a plurality of vehicle-side connectors are arranged in the vehicle cabin, and the detachable-side connector is configured to be connectable to an arbitrary vehicle-side connector. A switching control unit that is provided in correspondence with each connection switching unit and the current detection unit as the power supply control unit, and individually controls switching of these connection switching units; and Performs multiplex communication, at the time when the information signal is output from the information output means, determines the electrical component from the information signal and determines the connection switching means connected to the detachable unit incorporating the information output means, A general control unit for outputting a command signal including data relating to the current upper limit value to a switching control unit provided for the connection switching unit to perform switching control. If so obtain, even if the detachable connector to any of the vehicle-side connector is connected, it is suitable power supply control correspondingly. In addition, since the user can select the vehicle-side connector at a convenient position from the plurality of vehicle-side connectors and mount the detachable unit, the user can use the detachable unit in a more suitable state.

Here, the switching control unit and the corresponding connection switching unit and current detecting unit may be separately arranged. However, these units are incorporated into a common circuit board to form a single switch with a control function. With this configuration, the entire circuit can be further downsized and its structure can be simplified. Further, by housing the switch with all the control functions and the general control unit in a single joint box, the miniaturization and the simplification of the structure are further promoted.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to FIGS.

The vehicle shown in FIG. 1 has an engine room 10 at the front and a cabin 16 at the rear. In the engine room 10, a battery 1 is installed as a vehicle installation electrical component.
2 and a joint box 14 are provided. In the passenger compartment 16, there are a driver's seat 18, a passenger's seat 19, and a central seat 2.
0, and a rear seat 22 are provided. At the front of the cabin 16, an air conditioner (air conditioner) hard unit 24 and an air conditioner ECU
(Control unit for air conditioner) 26, NAVIE
CU (Control unit for car navigation) 2
8. Multiple ECU 29 in display section, speaker 30 with amplifier, audio ECU 32, instrument panel switch (switch incorporated in instrument panel)
An antenna 36 is provided at the rear. In the example shown in FIG. 1, the vehicle-side connectors 3 are provided at a plurality of locations in the passenger compartment 16, such as a side portion of the driver's seat 18, a side portion of the center seat 20, and a portion behind the rear seat 22.
8 are arranged, and these vehicle-side connectors 38 are interconnected with the above-described electric components via a power line Lb and a multiplex signal line Lb.

The vehicle includes a plurality of types of detachable units (in this embodiment, an audio detachable unit 40A as shown in FIGS. 2 and 3; a car navigation detachable unit 40B as shown in FIG. 4; 5 is prepared, and any of the detachable units 40A, 40B, 40C is provided.
Can be connected to an arbitrary vehicle-side connector 38.

Specifically, each of the detachable units 40A to 40C
Have a unit housing 41 as a common component.
And a multiplex E incorporated in the unit housing 41.
A CU (information output means) 42 and a detachable connector 4C are provided, and the detachable connector 4C is configured to be connectable to an arbitrary vehicle-side connector 38. In addition, as electrical components, an audio switch unit 43 and a disc changer (CD / MD changer) 44 as shown in FIG. 3 are incorporated in the detachable unit 40A, and a car as shown in FIG. Navigation switch unit 45, disc changer 4
6, and a liquid crystal screen / switch / speaker composite unit 47 are incorporated. A detachable unit 40C includes an air conditioner switch unit 48 as shown in FIG.
Is incorporated.

As shown in FIG. 2, when the vehicle-side connector 38 and the detachable connector 4C are connected to each other, the multiplex ECU 42 and the detachable unit are connected to the battery 12 via the fusible link FL and the connectors 38 and 4C. Power is supplied to the electrical components (the switch unit 43 and the disc changer 44 in FIG. 2), and the electrical components on the detachable unit side and the electrical components on the vehicle body (audio EC) are connected.
U32) are multiplex-communicated via the multiplex ECU 42. That is, the connectors 38 and 4C
With this, a new electronic system is being constructed.

For example, when the detachable connector 4C of the detachable unit 40A is connected to an arbitrary connector of the vehicle connector 38 shown in FIG. 1, a new audio system as shown in FIG. 3 is constructed. In this system, for example, when the switch unit 43 receives an operation, command data (on / off switching command,
A multiplex signal including a radio / CD selection command, a volume control command, a music selection command, a channel selection command, etc.) and address data on the other party address (address of the audio ECU 32) is output from the multiplex ECU 42 (not shown in FIG. 3). Audio ECU 32 incorporating this
Outputs a multiplex command signal corresponding to the command data of the multiplex signal to another electrical component. For example, it outputs a multiplex signal including address data of the speaker 30 with the amplifier and a volume change command, and a multiplex signal including address data of the disc changer 44 and a music selection command in the electrical unit 40A.

When the detachable connector 4C of the detachable unit 40B is connected to one of the vehicle-side connectors 38,
A new audio system is constructed as shown in FIG. In this system, for example, when the switch unit 45 receives an operation, command data (data related to on / off switching command, function selection, destination setting, search, VISC, etc.) corresponding to the operation content and a counterpart address (N
A multiplex signal including the address data of the AVI ECU 28 is output from the multiplex ECU 42 (not shown in FIG. 4), and the NAVIECU 28 taking in the multiplex signal transmits the multiplex command signal corresponding to the command data of the multiplex signal to another electrical component. Output to For example, it outputs a multiplexed signal including the address data of the speaker 30 with the amplifier and the voice guidance command,
Or a multiplex signal including the address data and the map data output command signal. The disc changer 46 taking in the multiplexed signal transmits the N
A multiplex signal having the address data of the AVI ECU 28 and the map data is output, and the NAVIE fetches this signal.
The CU 28 outputs a multiplex signal having address data of the liquid crystal screen / switch / speaker composite unit 47 and a map display command.

When the detachable connector 4C of the detachable unit 40C is connected to one of the vehicle-side connectors 38,
A new air conditioner system as shown in FIG. 5 is constructed. In this system, the switch unit 4
8 receives the operation, command data (on / off switching command, function selection, wind material switching,
A multiplex signal including the address data of the other party address (address of the air conditioner ECU 26) and the address data of the other party address (address of the air conditioner ECU 26) are output from the multiplex ECU 42 (not shown in FIG. 5). A multiplex command signal corresponding to the data (a multiplex signal having data relating to air volume and temperature and address data of the air conditioner hardware unit 24) is output. The air conditioner hard unit 24 that has received this signal performs air volume adjustment and temperature adjustment according to the command.

Next, a power supply device in the vehicle will be described.

As shown in FIG. 2, a fusible link FL, a plurality of fuses FS, a multiple ECU (overall control unit) 13 and a plurality of I
A PS (Intelligent Power Switch) 60 is housed.

The fusible link FL is used in common for the vehicle-mounted electric components and the detachable electric components of the detachable units 40A to 40C. The circuit branches for each connector 38. The fuse FS is arranged upstream of each installed electrical component, and has a capacity corresponding to the current capacity of the electrical component. The IPS 60 is a switch with a control function in which a plurality of types of circuit elements are mounted on a single circuit board and integrated, and is disposed upstream of each vehicle-side connector 38.

More specifically, each IPS 60 includes a semiconductor switch element 61, a current detection element 62, a short-circuit detection section 63 composed of an integrated circuit, and a switching control section 64 as shown in FIG. The semiconductor switch element 61 is composed of, for example, a transistor or an FET, and is controlled by the battery 12 and the vehicle
Can be switched between a connection state and a cutoff state. The short-circuit detecting section 63 determines the allowable current value based on the allowable current value specified by the switching control section 64 and outputs the current value (semiconductor switch element 61) detected by the current sensor 62.
When the value of (primary current) exceeds, a short circuit is determined to have occurred, and a command signal is output to the switching control unit 64. The switching control unit 64 forcibly switches the semiconductor switch element 61 to the cut-off state when a command signal is input from the short-circuit detection unit 63, and performs a control operation according to the command signal input from the multiplex ECU 13. Is configured.

The multiplexed ECU (overall control unit) 13 performs multiplexed communication with the multiplexed ECU 42 in a state where one of the detachable units 40A to 40C is mounted on the vehicle-side connector 38, and according to the contents of the communication. Each IPS60
The switching control section 64 is generally controlled. The multiplex ECU 13 includes a memory 13a, and is configured to store a connection state between each vehicle-side connector 38 and the detachable units 40A to 40C, an abnormality occurrence fact, and the like.

On the other hand, each multiplex ECU 42 has an internal power supply, and stores in the memory 42a a current cutoff characteristic corresponding to the load characteristic of the electrical component mounted on the same detachable unit as the multiplex ECU 42, and stores data relating to the characteristic. Can be output as appropriate.

In the present embodiment, the current cutoff characteristic is stored in the memory 42a as a relationship between an elapsed time from power-on and an allowable current value. For example, when the load characteristic of the electrical component mounted on the detachable unit is a lamp load characteristic as shown by the solid line in FIG. 7A, the current interruption characteristic as shown by the broken line in FIG. Is stored in the memory 42a, and the load characteristics of the electrical components are shown in FIG.
In the case of the resistance-based load characteristic as shown by the solid line, the current cutoff characteristic as shown in the figure is stored in the memory 42a. In the case where a plurality of electrical components are incorporated, such as the detachable unit 40A, a characteristic obtained by combining the current interruption characteristics of these electrical components (for example, a characteristic obtained by adding the allowable current value of each electrical component) is stored. ing.

Therefore, when the load characteristics of the electrical components are all resistance-based, the allowable current value is constant regardless of time, so that only the allowable current value needs to be stored as the current cutoff characteristic. . Further, even in the case of the lamp system load characteristic, when the time variation of the current is relatively small, a constant current allowable value may be set regardless of the time.

The current interrupting characteristics of each of the detachable units 40A to 40C may be stored in the memory 13a of the multiplex ECU 13, and a signal that allows only the unit to be determined may be output from the multiplex ECU 42 of the unit. .
However, the multiple ECUs 1 of the detachable units 40A to 40C
If the current interruption characteristic is stored in the storage unit 3, the required data can be distributed to the detachable units 40A to 40C, and the storage capacity of the memory 13a in the multiplex ECU 13 can be greatly reduced.

Next, the control operation performed by each ECU will be described.

In a state where the detachable units 40A to 40C are not connected to any of the vehicle-side connectors 38,
In all the IPSs 60, a switching operation for turning off the semiconductor switch element 61 is performed. At this time, the state of the semiconductor switch element 61 may be a connection state. However, if the semiconductor switch element 61 is in a cut-off state, conductive foreign substances (for example, water or metal) are simultaneously attached to a plurality of terminals of the vehicle-side connector 38. However, there is an advantage that no short circuit occurs and the circuit can be protected more safely.

When any of the detachable units 4A of the detachable units 40A to 40C is connected to one of the vehicle-side connectors 38, the multiplex ECU 42 incorporated in this detachable unit is operated by its internal power supply. And the multiplexed signal to the multiplexed EC in the joint box 14.
Output to U13.

Multiplex ECU 13
Is connected to one of the vehicle-side connectors 38 by the detachable unit 4.
It is possible to grasp the fact that any one of 0A to 40C has been attached, but at this time, it is not possible to grasp to which vehicle-side connector 38 the detachable unit is connected. Therefore, the multiplex ECU 13 performs the following confirmation operation.

First, the multiplex ECU 13 sets the specific IPS 6
0 and outputs a command signal to the switching control unit 64 of the IPS6.
The pulse signal is input to the semiconductor switch element 61 of the “0”.
The semiconductor switch element 61 is repeatedly turned on and off at a predetermined cycle. At this time, the multiplex ECU 42 of the detachable unit mounted on the vehicle-side connector 38 monitors the voltage state of the signal input to the electric components in the unit by the voltage detection unit incorporated therein. If the voltage remains zero irrespective of the on / off operation of the semiconductor switch element 61, it can be determined that the IPS 60 is not connected to this detachable unit. Is not output. On the other hand, if the voltage changes in conjunction with the on / off of the semiconductor switch element 61, it can be determined that the IPS 60 is connected to the detachable unit.
Output a confirmation signal to Therefore, depending on the presence or absence of this confirmation signal, the multiplex ECU 13 determines whether the I
It can be confirmed whether the PS 60 is connected to the detachable unit, that is, whether the vehicle-side connector 38 corresponding to the IPS 60 is the connector to which the detachable unit is connected.

Therefore, if the multiplex ECU 13 cannot obtain a confirmation signal from the multiplex ECU 42 in response to the confirmation operation, the multiplex ECU 13 performs the same confirmation operation for the next IPS 60,
Until the confirmation signal is obtained, the same confirmation operation is performed for each IPS 60 in order. When the confirmation signal is obtained (that is, when the IPS6 newly connected to the detachable unit is
0), the confirmation operation is stopped, and the IPS6
IPS connected to the detachable unit (IP in use)
S) is stored in the memory 13a. Therefore, when another detachable unit is connected to one of the vehicle-side connectors 38 next, the confirmation operation needs to be performed only for the unused IPS other than the used IPS.

At the time when the IPS 60 newly connected to the detachable unit is found by the confirmation operation, the multiplex ECU 13 outputs a command signal to the multiplex ECU 42 and requests the multiplex ECU 13 to output an information signal having data relating to the current interruption characteristics. I do.

Multiple ECU 42 receiving command signal
Outputs an information signal having the data (data stored in the memory 42a) to the multiplex ECU 13. Based on this information signal, the multiplex ECU 13 can determine which of the detachable units 40A to 40C the newly attached detachable unit is, and can grasp the current interruption characteristics corresponding to this. Therefore, the multiplex ECU 13
The command signal including the current cutoff characteristic data is output to the switching control unit 64 of the IPS 60 that has been confirmed.

If the capacity of the memory 13a of the multiplex ECU 13 is large and the current cutoff characteristic data can be temporarily stored, information including the data is immediately obtained at the above-mentioned time (that is, at the time when the detachable unit is mounted). The signal may be output to the multiplex ECU 42 and may be stored in the memory 13a of the multiplex ECU 13. In this case, the operation of, becomes unnecessary.

The switching control unit 64 which has received the command signal
Inputs a control signal to the semiconductor switch element 61 and switches it to a connected state. As a result, the electrical components in the detachable unit (for example, the multiplex ECU 42, the switch unit 43, and the disk changer in the detachable unit 40A) are sequentially passed from the battery 12 through the fusible link FL, the IPS 60, the vehicle-side connector 38, and the detachable-side connector 4C. 44) is supplied with power.

During power supply, if the current value detected by the current detection element 62 exceeds the allowable current value of the current cutoff characteristic input from the multiplex ECU 13, the short circuit detection unit 63 determines that a short circuit has occurred. Judgment and switching control unit 6
The switching control section 64 outputs a command signal to the switch 4 and immediately switches the semiconductor switch element 61 to the cutoff state. Thus, overheating of the wiring and the like due to the overcurrent can be prevented.

The multiplex ECU 13 that has received the abnormality occurrence signal from the switching control unit 64 outputs a multiplex signal to the multiplex ECU 29 (FIG. 2) of the display unit to perform a warning operation such as lighting of a lamp and a display of an abnormal part. At the same time, the items related to the occurrence of the abnormality (the location where the abnormality occurs and the time when the abnormality occurs) are stored in the memory 42a. Therefore, after the occurrence of the abnormality, the details of the abnormality can be grasped by calling the data in the memory 42a at a repair shop such as a dealer, and the information can be used for repairing the circuit and preventing the recurrence of the abnormality. In addition, it is possible to return to the power supply state only by switching the semiconductor switch element 61 to the connection state, and it is not necessary to replace the fuse as in the conventional case.

In the present invention, the number of types of the detachable unit may be set as appropriate regardless of the number of types. The number and location of the vehicle-side connectors 38 may be set as appropriate. For example, only a single vehicle-side connector 38 may be installed, and a plurality of types of detachable units may be selectively mounted on the single connector 38. . In this case, it is possible to perform power supply control only with a single IPS 60, and to exchange signals without performing multiplex communication. However, if the above-described multiplex communication system is adopted, there is an advantage that the wiring structure can be simplified even when the vehicle-side connector 38 is single.

Even when a plurality of vehicle-side connectors 38 are arranged, the above-described IPS 60 is not used, and the connection switching means, the current detection means, and the switching control unit, which are the constituent elements thereof, are individually integrated without being integrated. It is also possible to arrange. In this case, a relay switch or the like can be used as the connection switching means instead of the semiconductor switch element. However, by using the IPS 60, the circuit can be significantly reduced in size, and furthermore, by storing all these IPSs 60 in the single joint box 14, the advantage that the wiring structure can be further reduced and simplified can be obtained.

The vehicle-side connector 38 may be arranged alone on the vehicle. However, a unit insertion portion is provided at a position where the vehicle-side connector 38 is disposed, and the detachable connector of the detachable unit and the vehicle-side connector 38 can be coupled with the unit housing 41 of the detachable unit inserted into the unit insertion portion. If the vehicle-side connector is placed in the
Further, the mounting state of the detachable unit can be stabilized.

FIG. 8 shows an example. The illustrated unit insertion member 50 has a unit insertion space 51 that opens upward, and a connector support frame 55 is erected at the center of the bottom wall in the unit insertion space 51, and a vehicle side is provided inside the connector support frame 55. A connector 38 is provided. The vehicle-side connector 38 is integrally connected to the connector support frame 55 via a thin connecting piece 55a, and can be slightly displaced horizontally with respect to the connector support frame 55. A harness wiring groove 5 is provided in a region from below the connector support frame 55 to the outer surface of the unit insertion member 50.
The vehicle-side wire harness W is wired in the harness wiring groove 57, and its terminal is connected to each terminal 38 a of the vehicle-side connector 38. That is, each terminal 38 a of the vehicle-side connector 38 is connected to the joint box 14 and the battery 12 via the wire harness W. On both left and right sides of the connector support frame 55, elongated holes 54 penetrating the bottom wall of the unit insertion member 50 are formed.

On the other hand, the unit housing 41 has a shape capable of being inserted into the unit insertion space 51 from above.
On the bottom surface, a ridge 41a that can be inserted from above into each of the through grooves 54 is provided so as to project downward, and the insertion positions the unit housing 41 relative to the unit insertion member 50 in the horizontal direction. I have. The detachable connector 4 is attached to the bottom wall of the unit housing 41.
C is provided, and the detachable unit 40A (or 40B, 40C) is inserted into the unit insertion space 51 in such a manner that the ridge 41a is inserted into the elongated hole 54, so that the detachable unit 40A is attached to and detached from the vehicle-side connector 38. The side connector 4C is automatically coupled.

According to such a structure, the connectors 38 and 4C can be easily connected only by inserting the unit housing 41 into the unit insertion member 50.
Moreover, the unit housing 41 can be stably supported.

[0048]

As described above, according to the present invention, when the detachable connector of one of the detachable units is connected to the vehicle connector, the unit-side electrical component can be identified from the information output means of the detachable unit. An information signal is output,
On the basis of this, the power supply control means determines the electric component and performs control to cut off the electric power supply when the detected current value exceeds the allowable current value corresponding to the electric component. Automatically determine the connected electrical components and execute appropriate power supply control appropriate to the load characteristics while enhancing the functionality of the vehicle by selectively connecting multiple types of electrical components to the vehicle. This has the effect of ensuring high security.

If the information output means stores data relating to the current upper limit value and outputs an information signal including the data, the amount of information to be stored is distributed to each detachable unit to control the power supply. The effect that the required storage capacity of the means can be greatly reduced is obtained.

If the power supply control means is configured so as to shut off the vehicle-side connector and the power supply in a state where the detachable-side connector of any detachable unit is not coupled to the vehicle-side connector, the detachable-side connector is coupled. Thus, an effect is obtained that a short circuit in the vehicle-side connector is prevented beforehand so that more appropriate circuit protection can be achieved.

When the information output means and the power supply control means are configured to perform mutual multiplex communication, sufficient information exchange can be performed while simplifying the wiring structure.

In this case, a plurality of vehicle-side connectors are arranged in the vehicle cabin, and the detachable connector is configured to be connectable to an arbitrary vehicle-side connector. A switching control unit that is provided in correspondence with each connection switching unit and the current detection unit as the power supply control unit, and individually controls switching of these connection switching units; and Performs multiplex communication, at the time when the information signal is output from the information output means, determines the electrical component from the information signal and determines the connection switching means connected to the detachable unit incorporating the information output means, A general control unit for outputting a command signal including data relating to the current upper limit value to a switching control unit provided for the connection switching unit to perform switching control. If so obtain, even if the detachable connector to any of the vehicle-side connector is connected, it is suitable power supply control in response to this and,
The effect that the user can use the detachable unit at a convenient position is obtained.

Here, the switching control unit and the corresponding connection switching means and current detecting means are assembled on a common circuit board to form a single switch with a control function, thereby reducing the size of the entire circuit and reducing the size of the circuit. The structure can be simplified, and all the switches with control functions and the general control unit are housed in a single joint box, so that the miniaturization and simplification of the structure can be further promoted. Is obtained.

[Brief description of the drawings]

FIG. 1 is a wiring diagram of a vehicle according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a device for supplying power to a detachable unit in the vehicle.

FIG. 3 is a block diagram showing an audio system constructed in the vehicle.

FIG. 4 is a block diagram showing a car navigation system constructed in the vehicle.

FIG. 5 is a block diagram showing an air conditioner system constructed in the vehicle.

FIG. 6 is a block diagram showing a functional configuration of an IPS used in the power supply device.

FIGS. 7A and 7B are graphs showing an example of a load characteristic of an electric component mounted on a detachable unit and an example of a current cutoff characteristic set correspondingly thereto.

FIG. 8 is a sectional front view showing a state in which a unit housing of the detachable unit is inserted into a unit insertion member.

FIG. 9 is a circuit diagram showing an example of a conventional power supply device for electric components in a vehicle.

[Explanation of symbols]

 Reference Signs List 12 Battery (power supply) 13 Multiple ECU (overall control unit) 14 Joint box 16 Vehicle compartment 38 Vehicle side connector 40A to 40C Detachable unit 41 Unit housing 42 Multiple ECU (information output means) 43 Switch unit (electrical component) 44 Disk changer ( Electrical components) 4C Detachable connector 60 IPS (Switch with control function) 61 Semiconductor switch element 62 Current detection element 64 Switching control unit

Claims (7)

[Claims] A vehicle-side connector is provided in a vehicle interior of a vehicle, and a plurality of types of electrical components used in the vehicle are combined with respective detachable-side connectors that can be coupled to the vehicle-side connector to form a plurality of types of detachable units. In a state in which the detachable connector and the vehicle-side connector are coupled to each other, power is supplied from a power source mounted on the vehicle to the electrical component, and the detachable unit is provided on the detachable unit side. An information output means for outputting an information signal for determining an electric component incorporated in the detachable unit to the vehicle through the two connectors; and an information output means provided between the power supply and the vehicle-side connector; Connection switching means for switching between a connection state for connecting to a connector and a disconnection state for disconnection, and a current for detecting a current flowing from the power supply to the vehicle-side connector Detecting means for detecting an electrical component connected to the vehicle-side connector based on an information signal output from the information output means, and detecting a value detected by the current detecting means rather than a current upper limit corresponding to the electrical component. Power supply control means for switching the connection switching means to the cut-off state when the power supply exceeds the power supply apparatus. 2. The power supply device for electrical components in a vehicle according to claim 1, wherein said information output means stores data relating to said current upper limit value and outputs an information signal including said data. A power supply device for electrical components in a vehicle, comprising: 3. The power supply device for electrical components in a vehicle according to claim 1, wherein the vehicle-side connector and the power supply are connected to each other when no detachable-side connector of any detachable unit is connected to the vehicle-side connector. A power supply device for electric components in a vehicle, wherein the power supply control means is configured to shut off the power supply. 4. The power supply device for electric components in a vehicle according to claim 1, wherein the information output means and the power supply control means perform multiplex communication between them. A power supply device for electrical components in a vehicle, comprising: 5. The power supply device for electric components in a vehicle according to claim 4, wherein a plurality of vehicle-side connectors are arranged in the vehicle compartment, and the detachable-side connector is connectable to an arbitrary vehicle-side connector. The connection switching means and the current detection means are provided for each vehicle-side connector, and the power supply control means is provided corresponding to each of the connection switching means and the current detection means. A switching control unit that individually performs control, performs multiplex communication with the information output unit, and when an information signal is output from the information output unit, determines an electrical component from the information signal and incorporates the information output unit. The connection switching means connected to the attached detachable unit is determined, and a switching control unit provided for the connection switching means includes a finger including data relating to the current upper limit value. A power supply device for electric components in a vehicle, comprising: a general control unit that outputs a command signal to perform switching control. 6. The power supply device for electric components in a vehicle according to claim 5, wherein the switching control unit and the corresponding connection switching unit and current detection unit are integrated on a common circuit board to perform a single control. A power supply device for electric components in a vehicle, wherein the power supply device is configured as a switch with a function. 7. A power supply apparatus for electric components in a vehicle according to claim 6, wherein the switch with all control functions and the general control unit are housed in a single joint box. Power supply.